Electrical Data - Carrier WEATHERMASTER 50HJQ004-016 Product Data

50TFQ004-012 (UNITS WITH ELECTRICAL CONVENIENCE OUTLET) (cont)
UNIT NOMINAL IFM
50TFQ V-PH-Hz TYPE
STD
460-3-60 ALT
012
HIGH-STATIC
(10 Tons)
STD
575-3-60 ALT
HIGH-STATIC
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM — Outdoor Fan Motor
RLA — Rated Load Amps
*Heaters are field installed only.
†Used to determine minimum disconnect size per NEC.
**Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v, and 575 v. If power
distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.
††Fuse or HACR circuit breaker.
***Optional disconnect switch is unavailable.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment (refer
to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or
HACR breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use
the following formula to determine the percent of voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
VOLTAGE COMPRESSOR
RANGE (each)
Min Max RLA LRA
414 508 8.6 59.6
414 508 8.6 59.6
414 508 8.6 59.6
518 632 6.9 49.4
518 632 6.9 49.4
518 632 6.9 49.4
452 + 464 + 455
3
1371
=
3
ELECTRIC
HEAT*
OFM IFM
FLA FLA
Nominal
FLA
kW**
— —
16.5 19.8
27.8 33.4
0.7 2.6
33.0 39.7
41.7 50.2
50.0 60.1
— —
16.5 19.8
27.8 33.4
0.7 3.4
33.0 39.7
41.7 50.2
50.0 60.1
— —
16.5 19.8
27.8 33.4
0.7 7.4
33.0 39.7
41.7 50.2
50.0 60.1
— —
17.0 17.1
0.7 2.6
34.0 34.1
51.0 51.2
— —
17.0 17.1
0.7 3.4
34.0 34.1
51.0 51.2
— —
17.0 17.1
0.7 7.4
34.0 34.1
51.0 51.2
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local elec-
tric utility company immediately.
→
POWER EXHAUST ELECTRICAL DATA
POWER EXHAUST
PART NO.
CRPWREXH021A01
CRPWREXH022A01
CRPWREXH023A01
CRPWREXH028A01
CRPWREXH029A01
CRPWREXH030A01
N/A — Not available
NOTE: If a single power source is to be used, size wire to include power exhaust MCA and
MOCP.
Check MCA and MOCP when power exhaust is powered through the unit. Determine the new
MCA including the power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 50TFQ006---5 unit with MCA = 35.6 and MOCP = 40, with
CRPWREXH030A01 power exhaust.
MCA New = 35.6 amps + 1.6 amps = 37.2 amps
If the new MCA does not exceed the published MOCP, then MOCP would not change. The
MOCP in this example is 40 amps and the MCA New is below 40; therefore the MOCP is
acceptable. If "MCA New" is larger than the published MOCP, raise the MOCP to the next larger
size. In all cases, the MOCP for the power exhaust should be 15 amps per NEC.
205
DISCONNECT
POWER SUPPLY
MCA MOCP FLA
25.5 30†† 27
50.3 60†† 50
67.3 70 65
75.2 80 73
88.3 90 85
85.6 90 96
26.3 30†† 28
51.1 60†† 51
68.1 70 66
76.0 80 73
89.1 90 86
86.4 90 97
30.3 35†† 32
55.1 60†† 55
72.1 80 71
80.0 80 78
93.1 100 90
90.4 100 102
20.5 25†† 22
41.8 45†† 41
63.1 70 61
71.7 80 80
21.1 25†† 22
42.5 45†† 42
63.7 70 62
72.3 80 81
24.3 25†† 26
45.7 50†† 46
66.9 70 65
75.5 80 85
= 457
7
457
MCA MCA MCA
(230 v) (460 v) (575 v)
power source)
N/A 0.68 N/A
3.4 N/A 1.32
N/A 1.4 N/A
1.7 N/A 0.68
N/A 0.7 N/A
1.6 N/A 0.64
SIZE†
LRA
145
165
178
185
195***
205***
185
204
218
224
235***
245***
179
198
212
218
229***
239***
120
137
154
171***
151
168
185
202***
146
163
180
198***
MOCP
(for separate
15
15
15
15
15
15
71